Workflow Error after Upgrade

[Sven Kruse]

Hello,

I've made some Updates (Jira 7.5 to 75.1 + several Addons).

After updating I'm not able to drag and drop an issue on the Kanban Board to DONE.

The following error occurs:

Could not load FunctionProvider class
It seems that you have tried to perform an illegal workflow operation.
If you think this message is wrong, please contact your JIRA administrators.

Kind regards,

Sven

[Sven Kruse]

Hello,

you are right. I've checked and disabled some addons and I found out that "Email this issue" was causing this problem.

I have disabled the addon and updated the workflow and now the problem is gone.

Thank you

Best,

Sven

[Nic Brough -Adaptavist-]

This is probably down to a broken add-on.

I suspect you have used a validator or post-function on the workflow transition that moves the issue into the status behind your "done" column. 

And, what you've used is provided by an add-on that either no longer supports it (that's unlikely), or the add-on is not functioning, so the classes being called are not there.

You'll need to look at the transitions in your workflow to work this out.